After Viz finished releasing
the
Ingido League set of episodes, they decided to skip the Orange Island
episodes
for the time being to start on the 158-episode Johto League.
Apparently,
Viz had planned to go back at a later date and release the Orange
Islands episodes as twelve
three-episode
discs, so they started the Johto Journeys DVDs with Volume
Thirty-Nine.
The company has since abandoned plans for individual Orange Island
discs, meaning Volumes 27-38 never came into existence.

Episodes 351
("The Psychic Sidekicks") and 352 ("Fortune Hunters") were not included
in these releases.